diff --git a/.github/workflows/ant-regrtest.yml b/.github/workflows/ant-regrtest.yml
index 83b414110..b2c672e7c 100644
--- a/.github/workflows/ant-regrtest.yml
+++ b/.github/workflows/ant-regrtest.yml
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Set up JDK 21
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v5.6.0
         with:
           java-version: '21'
           distribution: 'temurin'
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index b15a818d2..c461c054c 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -22,7 +22,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up JDK 21
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v5.6.0
       with:
         java-version: '21'
         distribution: 'temurin'
diff --git a/.github/workflows/java-versions-regrtest.yml b/.github/workflows/java-versions-regrtest.yml
index a62c000cd..9ee04a833 100644
--- a/.github/workflows/java-versions-regrtest.yml
+++ b/.github/workflows/java-versions-regrtest.yml
@@ -35,7 +35,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v5.6.0
       with:
         java-version: ${{ matrix.version }}
         distribution: 'temurin'